OK, download and install this: http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?softwareitem=dj-96583-8&cc=us&dlc=en&lc=en&os=4114&product=4066452&sw_lang=
When it asks for the type of installation, choose Wireless. It will eventually ask you to plug in a USB cable temporarily so your Mac can communicate the network settings to the printer.